Reactive architectures - Abandoning the Client-server Paradigm for a More Performant Alternative

Nowadays applications must handle increasing amounts of data and provide ever faster response times to users, all while maintaining close-to-100% uptime. To meet those demands, N-tier architectures have become insufficient. That's why reactive architectures and systems are seeing an uptick in adoption; they offer the kind of scalability and responsiveness that traditional systems can't match. But how exactly do these reactive systems work?

The Reactive Manifesto identifies the core characteristics of reactive systems, which include: responsiveness, resiliency, elasticity, and message-driven behavior.